This is my first time on the Feminism board - I've only just found you!
This morning, DD (7) was playing with the Space Lego - lunar landscapes, spaceships, various astronauts and rocket launchers.
DS2 (5) appeared on the scene:
"No, no, sorry DD, please move away from the Space Lego, you'll only break it. Sorry, but this is a boy's toy, it's not for girls. Girls don't know about space, you'll just break it and not know how to fix it"

I'm pleased to report that DD fought her corner. And of course, I told him that we didn't gender code toys, that she was allowed to play with it just as much as he was, that she was just as capable of rebuilding it. And I told him about women astronauts and physicists. And I pointed out that given that his sister is particularly good at numeracy and science, there was no reason why she couldn't be an astro-physicist, should she wish.
But where the hell does this attitude come from?
DH is not like this at all, and DS2 sees him cook, and clean, and iron. His grandfather is the most egalitarian left-wing 66 year old you could ever meet. How have we ended up with a chauvinist 5 year old?
Suggestions, please, of things I can do to educate him, and also things I can do to ensure DD stays confident, and strong and ambitious.
(off now to tape pictures of Pamela A. Melroy to the fridge)